Frequency domain studies of current-induced magnetization dynamics in single magnetic-layer nanopillars

N. Müsgens; S. Fahrendorf; T. Maassen; A. Heiss; J. Mayer; B. Özyilmaz; B. Beschoten; G. Güntherodt

Frequency domain studies of current-induced magnetization dynamics in single magnetic-layer nanopillars

Materials Science 2012-01-13 v1 Mesoscale and Nanoscale Physics

Authors: N. Müsgens , S. Fahrendorf , T. Maassen , A. Heiss , J. Mayer , B. Özyilmaz , B. Beschoten , G. Güntherodt

Abstract

Spin transfer torque-induced high-frequency dynamics of single thin cobalt-layer nanopillars of circular and elliptical shape have been observed directly. Two types of precessional modes can be identified as a function of magnetic field perpendicular to the layer plane, excited for negative current polarity only. They are assigned to vortex-core and transverse spin-wave excitations, which corroborate recent model predictions. The observed narrow linewidth of 4 MHz at room temperature indicates the high coherence of the magnetic excitations.

Keywords

spin transfer torque magnetization dynamics nanopillars vortex-core excitation spin-wave excitation frequency domain

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@article{arxiv.1201.2268,
  title  = {Frequency domain studies of current-induced magnetization dynamics in single magnetic-layer nanopillars},
  author = {N. Müsgens and S. Fahrendorf and T. Maassen and A. Heiss and J. Mayer and B. Özyilmaz and B. Beschoten and G. Güntherodt},
  journal= {arXiv preprint arXiv:1201.2268},
  year   = {2012}
}

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10 pages, 3 fihures

Frequency domain studies of current-induced magnetization dynamics in single magnetic-layer nanopillars

Abstract

Keywords

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